What is the main theme in the novel, The Enchanted Castle?

The main theme of the book is enchantment—the potential magic that underlies daily life for those who are receptive and who have not been inured to it by greed or selfishness. The four young people seek out magic and find it, but the magic also awaits the French governess in her unfulfilled love, the police constable who deserves a reward, and the housekeeper's niece in need of love and companionship.